Process for electrolytically refining tin.



G. MICHAUD E. DBLSSON.

PROCESS FOR ELETRLYTALLY HHNING TIN,

AILLUIAI'WN MLV SEPT. v7. wiz.

1 1 24, 315. mmm Jun. 1:2. 19151,

PROCESS PGR ELE Pzimte 5ml. l2, 191.5.

il SHEETS SHEET 2.

y To a wiom it may cm'ioem ononens niocannsnn EUGENE nnisssoii, onMoNTnEUIL, nunon. f

'YBCESS EUR ELECTROLYTICALL REFmNC-l Tlf.

Ee it known that we, Gnoizons and EUGENE Buisson, both'citizens oi theRepbiic ,of France, residing at 66 Rue Arsene Cherouu, Montreuil, Seine,in the Republic of France, have invented a 'cer-- ,tain new and usefui.improvement in infocgs'ses for Eiectroiytically Bening Tin, ci

@which the following is a. specification.

The invention which forms the objeci oi thisvappication for pat-ent andwhich refining of tin applicable to any conducing maeria containing tinor sewing io support it, is bas'ed essentiaily upon the compostion oftime eioctrcyte n on the arrangemen rendering it. possb e byoontinuouscirculation to insure a ermanen condition of sauisztlon to ine foie.

electi'oiyte and also upon thecomposition of the electrodes. v Thisprocess based upon the eiectioysisA of .a composite` tin salt renders ispossioe to obtain' regulmiy 2.22 grs. of chemicaiiy pure tin per amperehour and this in e. zii' more economcaimanne/r than with he ar-Ai'angciiients ordinarily onipojfed.

Composition of iw eec'roiyze.`hc composition of one eiectioye is asioiiows pro to ohlorid of tin.J to which mamiesium chloiid. sind borisacid sie added. of tin dissolve@ in water is ociduiae with Suniio aciuntil the precipitate of hyfirate is oompietciy dssoived; at this moment1% of magnesium ohlorid and 1% of' boiiio aci. are added to the 'liqnoinFoimz'mi. of the mimiek-Ehe :inocies are constituted either by the tinto' bo refined morsiy ponic in granular oim ino tiio wats? or any otherconducting mfieifol' serving as snppoiil foi the tin.

Fofmoma of #is cozode's.-The cath-ados are oi e5; by fixed copper piziesarianged, on edge nd upon die opp@ es of which the deposit of pure in isganci in nonadhesive afhoiesoenocs which of@ cozicncfi fand coiected 'byone of she :irrangcinens indicste in the drawings. These conoci piai'esmay oe repiocc by any oiiei nriangenient pi'esening but a smaii surfacein conteo?. with this eiectroiyte.

In oi'ici to v0.3 any solution of foreign metals in che eieotsplytewhich Wouici result in @inducing an impure nie'mi must ne oontinuciisnysasuraeci.

This sato."

MICHAUD' Tie proto choiid "iiie latter vration iso'itcined in a troughcontaningfoi' wase Ginny kind in Which the eioctroiyc circulates comingfrom theclectrolysis aniof This circulation is produced by' a pomoAwhich ietuins the iiquonto 'ne slectrolysisQv trink from which itarrived in an acid state.. ,89,5

In passing over the Waste it has dissbivedthe tin and again becomesSaturated. f

The homogeneity of the eiectrolytc is-obJ-ztained noi'J oniy by checiicuiationofvsiic.

iql'i'fi' but also by .the agitation,pi'oduced' by the inovemeni; of thecoilectors `which operato Iinthe electrolysis tank. fomhe pnrpose o'ooiieotin he pure tin produced.

Figuffs l A'2 iiiustrzie diaigrammati-j caiiy in .elevation and in planrespeciiyeiv..

:i form of'electroiizei' for the treatment ,il -ne granulated tin. Fig.3, iilustijates modication oi" this apparatus. Fig. #i iHiis-,fy

suites a 'oi'ni of apparatus ntiiize fon tiiei a support for he tin. Y i

Figs l and 2: a is the elecioiysis vossel of' msniziting mace-.rmicontaining the eiccff iroiyte. o is Wicker baske. lined with felttreatment of conducting material serving as; 75.;

(- c are cathode plates of coppe? ombedcieiir Y in 'on insiiiafing bodyand Aiipoiniiic,uppeij efige'o which the re-ined tin is depositedin.the-siate o non-ihcsivc crysaiiine aanhoren@ cences, Z d ae vessels intowhich the'fcoifA lector by moans of o ieoipiocn-inginlove? mont from ioy oiccs the in deposied upon one cahoiie pistes c inpioportion as it isfoimed.

It is from these vesseis it is iiien Withdrawn for casting it into o@inge-s. e is o coppei biock oy means o' which the corrono is brongiiinto conao. with the tin so no i'ene. is the posii'cii'oy conductor. gis the negative conductor. .Zi

are ooilectos mounted at eaoii extreniiy g5 z' is siie estimating is theeiccroiysis tank. b is the basket containg5 ing 'the mateizii undertijeanicn. c are the oatiiofie plates upon which the pure tin isdepostoi. i is the tank mi ine ecepion oi is piouced. ino .theifesscisioo it into the tank k.

y ductor.

positive conductors.

the pure tin. e is the copper block by means of which the current isbrought into contact with the tin to be relined. f is the positiveconductor. g is the negative conz are collectors mounted upon an endlesschainh serving to force the refined tin as it is produced into thevessel d.

Fig. 4 is an apparatus for the treatment of any conducting materialserving as support for the tin (tinncd iron Waste for example). a is theelectrolysis tank. b is thematerial from which the tin is to be removedforming the anode. 'b2 is an endlessl chain which conducts the materialfrom which the tin is to be removed and which carries the collectors. care the cathode plates upon `which the pure tin is deposited. el is,t`he

tank receiving the pure tin. e are flexible strips through which thecurrent enters; these strips may vary in number. f are'the y is thenegative coinh are collectors mounted on the is the small endless chaincon ductor` cha in L2.

veyer which receives the material deprived of its tin from the chain b:a7 discharges No means are shown for circulating the electrolyte overtin waste in Figs. 3 and el, but it will ,be understood that meanssimilar to that shown in Fig. 2, or other means, will he employed forthis purpose.

What .we claim and desire to sccureby Letters Patent of the UnitedStates is 1. A process of refining tin by electrolysis which consists inpassing an electric cur rent from an anode of impure tin to a cathodcthrough an electrolyte of high conduc.

tivity composed of protochlorid of tin l0() kilograms, sulfuric acid l0kgs., magnesium chlorid 1 kg., boric acid l kg., and the requisitequantity of distilled Water in order that the solution should mark 20Baume.

2. A process of refining tin by electrolysis which consists in passingan electric current from an anode of impure tin through an electrolyteof high conductivity composed of protochlorid of tin 100 kilograms,sulfuric acid 10 kgs., magnesium chloridl kg., boric acid l kg., and therequisite quantity of distilled water in lorder that the solution shouldmark 20 Baume, to a cathode with active surface equal to ot' the activesur face of the anode` Vand collecting automatically and continuously'the refined tin. de-

posited on the cathode.

A process of rcining tin by clef-trolysis which consists in passing anelectric current from an anode of impure tin through an electrolyte ofhigh conductivity composed ol protochlorid ot' tin lll?) kilograms,sulfuric acid lo i-cgs., inagifusuw ffhlorio l Lg., boric acid 1 kg.,and the rw,y -site quantity of distilled wat-iii' in order that the s0-iution should mark 20" Baume, to a cathode with active surface equal to22'?, of the active surface of the anode, collecting automatically andcontinuously the refined tin deposited on the cathode, the saturation ofthe electrolyte being maintained constant by a continuous circulationoiu the said electrolyte through a saturation tank containing este tin.

In testimony 'whereof we .-.ifilx our signa# turcs in presence of twowitnesses.

GEORGES MICHAUD. EUGli-JE DELASSON.

Witnesses:

ILxxso C. CoxE, Vic'rou MA'TuAY.

